some bugfixes for profile reading

diff --git a/ir/be/beprofile.c b/ir/be/beprofile.c
index 4e0efc9..39eec3e 100644 (file)
--- a/ir/be/beprofile.c
+++ b/ir/be/beprofile.c
@@ -460,6 +460,9 @@ typedef struct _intialize_execfreq_env_t {
        double freq_factor;
 } initialize_execfreq_env_t;
 
+// minimal execution frequency (an execfreq of 0 confuses algos)
+static const double MIN_EXECFREQ = 0.00001;
+
 static void initialize_execfreq(ir_node *block, void *data) {
        initialize_execfreq_env_t *env = data;
        double freq;
@@ -470,6 +473,8 @@ static void initialize_execfreq(ir_node *block, void *data) {
        } else {
                freq = be_profile_get_block_execcount(block);
                freq *= env->freq_factor;
+               if(freq < MIN_EXECFREQ)
+                       freq = MIN_EXECFREQ;
        }
 
        set_execfreq(env->execfreqs, block, freq);
@@ -483,6 +488,7 @@ exec_freq_t *be_create_execfreqs_from_profile(ir_graph *irg)
        initialize_execfreq_env_t env;
        unsigned count;
 
+       env.irg = irg;
        env.execfreqs = create_execfreq(irg);
 
        // find the successor to the start block
@@ -504,7 +510,7 @@ exec_freq_t *be_create_execfreqs_from_profile(ir_graph *irg)
                return compute_execfreq(irg, 10);
        }
 
-       env.freq_factor = 1 / count;
+       env.freq_factor = 1.0 / count;
        irg_block_walk_graph(irg, initialize_execfreq, NULL, &env);
 
        return env.execfreqs;